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Home My WebLink AboutEngineer's Test ReportsH-P~l<UMAR 5020 County Road 154 Glenwood Springs, CO 81601 Phone : (970) 945·7988 Fax : (970) 945-8454 Email: hpkglenwood@kumarusa .com Office Locations: Parker, Glenwood Springs, and Silverthorne, Colorado CONCRETE TEST REPORT Garfield County Road and Bridge Department Attn: Debbie Fiscus 0298 County Road 333A Rifle, Colorado 81650 Project No. Date Cast: Sheet: 16-7-279 11-23-16 1of1 Project: CNG Shop Addition, 0298 County Road 333A, Garfield County, Colorado Placement Location: Sidewalks Supplier: United Time Batched: Truck No: 6396 Time Arrived: Ticket No: 03309224 Time Placed: Mix Design: 36510700 Method of Placement: Truck Time Sampled: 8:20 am Wet Unit Wt: 7:33 am 8:00 am 8:10 am Load Size (Yds): 1 O Yds Delivered: 1 O Yds Ordered: 10 Truck Discharge Typical Specifications : Air Temp: 32° Slump: Sample Point: 139.7 pcf 4% inches 7.2 % Slump: 3 to 5 inches Concrete Temp: 76° Air Content: Air Content: 5 to 8 % Water Added: 15 gallons per contractor Communication: The supplier was informed of our field test results. Time Cylinders Cast: 8:30 am Initial Cure Time On Site : 1 day Field Storage: Insulated Cure Box Date in Lab: 11-24-16 Cylinder Temperature at Pick Up: 64° Min/Max: 52°/82° 2016 Lab Age Date Number Days 757A 7 11-30-16 7578 28 12-21-16 757C 28 12-21-16 7570 28 12-21-16 Compressive Strength Data Load Diameter Area lbs . in . in 2 49,400 4.01 12.63 62,600 4.01 12.63 61,700 4.01 12.63 62,000 4.01 12.63 Compressive Strength (psi) 3910 4960 4890 4910 28 Day Avg . (psi) 4920 Specified Strength for Structure: 4500 psi (typical) at 28 days Specified Strength for Mix: 4500 psi at 28 days Notes: Distribution: Garfield County Road and Bridge Department -Debbie Fiscus (dflscus@garfleld-county.com) PNCI Construction -Mark Viera (markv@pnclconstructJon.com) DPA Architectural Group -Doug Porterfield {do ug@dpaarchqroup.comt Monroe & Newell -Ryan Barth (rbarth@monroe·newell .com) United Companies Distribution List -~u_s_!!_n_Q!_,g .... ·i!_l ____ ~--~~-1-......x.:...~E----av1 . oung, .. lljf Field Technician Reviewed By H-P~.l<U MA R (;ectucr~n 1 c:11 E no1nei:;-: 1n~J ! E.npi1 ~eerin~J Geoio~Jv fv1atr;!nals l~s~rn~"'f Ji.: rrr .• 1ror:n1e:11:-;l 5020 County Road 154 Glenwood Springs, CO 81601 Phone: (970) 945-7988 Fax: (970) 945-8454 Email: hpkglenwood@kumarusa.com Office Locations: Parker, Glenwood Springs, and Silverthorne, Colorado CONSTRUCTION ACTIVITY REPORT Client: Garfield County Road and Bridge Department Project No.: 16-7-279 Day: Date: Wednesday 10/19/16 1of1 Attn: Debbie Fiscus 0298 County Road 333A Rifle, Colorado 81650 Page: Project: CNG Shop Addition, 0298 County Road 333A, Garfield County, Colorado Weather: Clear, calm, dry Contractor's Construction Activities: Equipment in Use: H-P/Kumar's Site Activities: Verbal Communication: distribution: Temperature: °F at am Eagles Nest Contracting was scheduled to place foundation wall backfill today. None We visited the site in the morning and the afternoon for scheduled backfill compaction testing. No one was on site during our morning visit. In the afternoon we were Informed that backfill was delayed until 10/20/16. Contractor requested compaction testing on 10/20/16. Garfield County Road and Bridge Department -Debbie Fiscus (dfiscus@garfield-county.com) PNCI Construction -Mark Viera Cmarkv@pnciconstruction.com) Paul Weiser Thomas J. Westhoff, CET Field Technician Reviewed By /ljf H-P~KUMAR 5020 County Road 154 Glenwood Springs, CO 81601 Geutec!11w;.a! Engineer<ng I Engineering Ge0logy Phone: (970) 945-7988 idalerials Testtng I Environmental Fax: (970) 945-8454 Email: hpkglenwood@kumarusa .com Office Locations: Parker, Glenwood Springs, and Silverthorne, Colorado - Earthwork Compaction Testing Report Client: Garfield County Road and Bridge Department Project No.: 16-7-279 Day: Thursday Attn: Debbie Fiscus Date: 10/20116 0298 County Road 333A Page: 1 of 1 Rifle, Colorado 81650 Project: CNG Shop Addition, 0298 County Road 333A, Garfield County, Colorado Weather: Clear, calm, dry Temperature: 55° at 2:00 pm Earthwork Contractor: Eagles Nest Contracting Equipment Used: Trackhoe, skidsteer, jumping jack tamper Description of Earthwork Interior and exterior backfill for north wall of building addition was placed. Tested: Tests indicated acceptable compaction. Verbal Communication: Mark with PNCI was informed of our test results. Placement and Compaction Procedure: Not observed by H-P/Kumar Lift Thickness: Max. Rock Size: Moisture Conditioning: Compactor{s) Used: Number of Passes: Nuclear Gauge Moisture/Density Test Results Location Field Field Field Min. Test Depth or Dry Moisture Comp. Comp. Proctor No. Elev. Density Content Req. Lab No. (ocf) % (%) (%) 1 middle of N. side, exterior 3' below 114.1 14.6 99 9D 61-2 landscape subgrade 2 E. end of N. side under sidewalk, 2' below 113.9 14.7 98 95 61·2 exterior subgrade 3 E. end of N. side under sidewalk, subgrade 116.9 10.6 100 95 61-2 exterior 4 middle of N. side, interior 2' below slab 143.9 5.1 100 95 United subgrade 5111116 5 NW corner of building, interior slab 140,3 4.2 99 95 United subgrade 5/17116 Proctor Sample Reference: Lab No. Method Description Max. Dry Opt. Dens.{%) Moist.{%) 61-2 (102190-1) ASTM D 698 Sandy Lean Clav, On-site 115.7 14.2 United 5/17/16 ASTM D 1557 3" Aggregate Base Course, United Mamm Creek Pit 141.1 5.2 THIS REPORT PRESENTS OPINIONS AS A RESULT OF OUR OBSERVATIONSOF FILL PLACEMENT. we HAVE RELIED ON THE CON1RACTOR TO CONTINUE APPL YING THE RECOMMENDED COMPACTl\IE EFFORT AND MOISTURE TO FILL DURING THE TIMES WHEN OUR OBSERVER IS NOT OBSERVING OPERATIONS THE NUCLEAR DENSOMETER METHOD OF TESTING WAS USED IN SUBSTANTIAL ACCORDANCE WIT~ ASTM D 6938 Distribution: Garfield County Road and Bridge Department -Debbie Fiscus (dfiscus@garfleld-county.com) PNCI Construction -Mark Viera (markv@pnciconstruction.com) lljf Paul Weiser Thomas J. Westhoff, CET Field Technician Reviewed by H-P~l<UMAR 5020 County Road 154 Glenwood Springs, CO 81601 Phone: (970) 945-7988 Fax: (970) 945-8454 Email: hpkql enwood@kum a ru sa.com Office Locations: Parker, Glenwood Springs, and Silverthorne, Colorado REINFORCEMENT STEEL INSPECTION REPORT Client: Garfield County Road and Bridge Department Attn: Debbie Fiscus 0298 County Road 333A Rifle, Colorado 81650 Project No.: 16-7-279 Day: Date: Page: Thursday 10/6/16 1 of 1 Project: CNG Shop Addition, 0298 County Road 333A, Garfield County, Colorado Area of Inspection: Addition Footings Reference Documents Structural Drawings provided on site, Sheets S1 .0, S2.1 & 53.1. Used: Inspection Notes : Inspection Status: D Preliminary IZ! Final IZI Concrete reinforcement as noted above was judged to be in reasonable conformance with the referenced construction documents. 0 Exceptions Noted: Verbal Communication: Distribution: Mark with PNCI was informed that reinforcement was installed according to referenced construction documents. Garfield County Road and Bridge Department -Debbie Fiscus fdfiscus@garfield-county .com) PNCI Construction -Mark Viera (markv@pnciconstructioQ .com) /ljl Paul Weiser Thomas J. Westhoff, CET Field Technician Reviewed By H-P ·~l<UMAR 5020 County Road 154 Glenwood Springs, CO 81601 (oco:r:cllnic;.:il r_::ngirH3c;r;ng I Eng111eer1ng Geology Phone: (970) 945-7988 klnte11als Testing: E11vHonrnenw1 Fax: (970) 945-8454 Email: hokglenwood@kumarusa .com Orfice Locations: Parker, Glenwood Springs, and Silverthorne, Colorado Earthwork Compaction Testing Report Client: Garfield County Road and Bridge Department Project No.: 16-7-279 Day: Monday Attn: Debbie Fiscus Date: 10/24/16 0298 County Road 333A Page: 1 of 1 Rifle, Colorado 81650 Project: CNG Shop Addition, 0298 County Road 333A, Garfield County, Colorado Weather: Partly cloudy, calm, dry Temperature; 60° at 10:00 am Earthwork Contractor: Eagles Nest Contracting Equipment Used: Trackhoe, skldsteer, jumping jack tamper Description of Earthwork Interior and exterior foundation wall backfill was tested with acceptable results. Tested: Verbal Communication: Mark with PNCI was informed of our test results. Placement and Compaction Procedure: Not observed by H·P/Kumar Lift Thickness: Max. Rock Size: Moisture Conditioning: Comeactor{s} Used: Number of Passes: Nuclear Gauge Moisture/Density Test Results Location Field Field Field Min. Test Depth or Dry Moisture Comp. Comp. Proctor No. Elev. Density Content Req. Lab No. (pcf) % (%) (%) 1 6' S. of NW corner, exterior subgrade 118.5 9.9 100 90 61-2 2 middle of W. side, Interior 2' below slab 133.8 5.5 95 95 United subgrade 5/17/16 3 20' N. of SW corner, interior 1' below slab 133.9 3.8 95 95 United subgrade 5/17/16 4 SE corner, Interior slab 137.7 5.2 98 95 United subgrade 5/17/16 5 SW corner, interior slab 133.7 2.8 95 95 United subgrade 5/17/16 6 By new foundation next to 1' below slab 136.1 4.4 96 95 United building on east side subgrade 5/17/16 Proctor Sample Reference: Lab No. Method Description Max. Dry Opt. Dens.(%) Moist.(%) 61-2 (102190-1) ASTM D 698 Sandy Lean Clay, on-site 115.7 14.2 United 5/17/16 ASTM D 1557 Class 2 Aggregate Base Course, United Mamm Creek 141.1 5.2 nus REPORT PRESENTS OPINIONS AS A RESULT OF OUR ODSERVATIONSOF FILL PlACEl,iENT. WE HAVE RELIED ON THE CONTRACTOR TO CONTINUE APPi. YING THE RECOMMENDED COMPACTIVE EFFORT AND MOISTURE TO FILL OUR NG THE TIMES WHEN OUR OSS!:RVER IS NOT OBSERVING OPERATIONS THE NUCLEAR DENSOMETER METHOD OF TESTING WAS USED IN SUBSTANTIAL ACCORDANCE WIT fl ASTM D 6938 Distribution: Garfield County Road and Bridge Department~ Debbie Fiscus (dfiscus@garfield-county.com) PNCI Construction -Mark Viera (markv@pnciconstruction.com) lljf Paul Weiser Thomas J. Westhoff, CET Field Technician Reviewed by H-P ~l<U MAR 5020 County Road 154 Glenwood Springs, CO 81601 (.,._ 3lr:c:I 1111 ,_r; Jl[I ' ll!h" ! !:111]1 _I Ill 1 e l.Jgv Phone: (970) 945-7988 /'.lfl ' ll ii• Tl:i I fl' I ,, '•)rlJtl\! : 1 Fax: (970) 945-8454 Email: h (:!k g l~O~Qo d(@kum af!!s a .!;;o m -.. Office Locations: Parker, Glenwood Springs, and Silverthorne, Colorado -- Earthwork Compaction Testing Report Client: Garfield County Road and Bridge Department Project No.: 16-7-279 Day: Wednesday Attn: Debbie Fiscus Date: 10/26/16 0298 County Road 333A Page: 1 of 1 Rifle, Colorado 81650 Project: CNG Shop Addition, 0298 County Road 333A, Garfield County, Colorado Weather: Clear, calm, dry Temperature: 64° at 3:00 pm Earthwork Contractor: Coppersmith Plumbing Equipment Used: Not observed Description of Earthwork Interior under slab plumbing trench backfill using base course was tested for Tested: compaction. The test indicated adequate compaction. Verbal Communication: Mark with PNCI was informed of our test results. Placement and Compaction Procedure: Not observed by H-P/Kumar Lift Thickness: Max. Rock Size: Moisture Conditioning: Com eactor(s ) Used: Number of Passes : Nuclear Gauge Moistu re/D ensity Test Result s Location Field Field Field Min. Test Depth or Dry Moisture Comp. Comp. Proctor No. Elev. Density Content Req. Lab No. (pcf) % (%) (%) 1 N. end of plumbing trench slab 133.9 5.4 99 95 179-16 subgrade Proctor Sample Reference: Lab No. Method Description Max. Dry Opt. Dens.(%) Moist.(%) 179-16 ASTM D 698 Class 6 AaQrega.te Base Course 135.0 7.7 THIS REPORT PRESE N'TS OPINI ONS AS A RESUL T OF OUR OBSERVATIONSOF FIU PlACEMOO, WE HAVE RE LI ED ON lHE CONTRACfOR TO CONTI NUE APPL VING TH E RECOMM ENCE D COMPACTIVE EFFORT AND MOISTURE TO FILL DURING THE TIMES WHEN OUR OBSERVER IS NOT OBSERVING OPERATIONS THE NUCLEAR OENSOMETEA METHOD OF TESTING WAS USED IN SUBSTANTIAL ACCORDANCE WITH ASTM D 6938 Distribution: Garfield County Road and Bridge Department -Debbie Fiscus (dfiscus@garfield-county.com) PNCI Construction -Mark Viera (markv@pnclconst ructlon.com) /ljf Paul Weiser Thomas J. Westhoff, CET Field Technician Reviewed by - H -P~l<UMAR Gno10ct-i:·nca.r Eng:nf3CnnG l Enn1nt~enr.g (3eo1og~1 t.J .:n.0uc11s Tc::;r!r".Q j E!i"/1;-CJ.'lfr}t:11t~:d 5020 County Road 154 Glenwood Springs, CO 81601 Phone: (970) 945-7988 Fax: (970) 945-8454 Email: hpkgleowoad@kumarusa.com Office locations: Parker, Glenwood Springs, and Silverthorne, Colorado REINFORCEMENT STEEL INSPECTION REPORT Client: Garfield County Road and Bridge Department Attn: Debbie Fiscus 0298 County Road 333A Rifle, Colorado 81650 Project No.: 16-7-279 Day: Date: Page: Wednesday 10/12/16 1 of 1 Project: CNG Shop Addition, 0298 County Road 333A, Garfield County, Colorado Area of Inspection: Addition Foundation Walls Reference Documents Structural Drawings provided on site, Sheets 52.1 & 53.1 Used: Inspection Notes: Inspection Status: D Preliminary [8J Final [8J Concrete reinforcement as noted above was judged to be in reasonable conformance with the referenced construction documents. D Exceptions Noted: Verbal Communication : Distribution: Mark with PNCI was informed that reinforcement was installed according to the referenced construction documents. Garfield County Road and Bridge Department· Debbie Fiscus (dfiscus@garfield -co unty.com) PNCI Construction -Mark Viera (mark.v@pnclconstruction.com) /ljl Paul Weiser Thomas J. Westhoff, CET Field Technician Reviewed By H-P~KUMAR Geotechnical Engineering I Engineering Geology Materials Testing I Environmental 5020 County Road 154 Glenwood Springs, co 81601 Phone: (970) 945·7988 Fax: (970) 945·8454 Email: hpkglenwood@kumarusa.com Office Locations: Parker, Glenwood Springs, and Silverthorne, Colorado October 10, 2016 Garfie]d County Road and Bridge Department Attn: Debbie Fiscus 0298 County Road 333A Rifle, Colorado 8 J 650 dfiscus@garfie ld-county.com Project No. 16-7-279 Subject: Observation of Excavation, Proposed CNG Shop Addition, 0298 County Road 333A, Garfield County, Colorado Dear Ms. Fiscus: As requested by Mark Viera with PNCI Construction, Inc., a representative of H-P/Kumar observed the excavation at the subject site on September 28 and October 3 and 4, 20 J 6 to evaluate the soils exposed for foundation support. The findings of our observations and recommendations for the foundation design are presented in this report. HP Geotech (now H-P Kumar) previously conducted a subsoil study for design of foundations at the site for the origina1 development and presented our findings in a report dated April 23, 2002, HP Geotech Job No; 102 190. We also provided an addendum to the subsoil study for the proposed addition in a report dated December J 7, 20 J 5, HP Geotech Job No. J 15 588A. The proposed addition will be attached to the west side of the existing shop building. It is designed to be supported on spread footings bearing on undisturbed bedrock or suitable compacted structural fill with an allowable bearing pressure of 2,500 psf, based on our previous reports. At the time of our visit to the site on September 28, the foundation excavation had been cut in one level, about 31/2 feet below the adjacent ground surface. The soils exposed in the bottom of the excavation consisted of siltstone/sandstone bedrock in about the southern two-thirds of the excavation' and unsuitable clay and sand/silt soils in the northern o~e-third of the excavation. An exploratory .test pit excavated at the north addition footing Jine exposed bedrock at about 7 feet below design footing elevation. On October 3 and 4, we observed that the northern two-thirds of the foundation excavation had been excavated about 31/2 to I J feet below design footing elevation to expose sandstone/siltstone bedrock. No free water was encountered in the excavation and the bedrock was slightly moist. We then observed imported minus 6-inch "pit run" sandy gravel placed and compacted in relatively thin lifts to backfill the footing areas and capped with compacted % inch aggregate base course to re-establish design footing grade. The results of a gradation analysis performed on a sample of the "pit run" sandy gravel obtained from the site, presented on Figure I indicate that the material was too rocky to test for compaction by Garfield County Road and Bridge Department October 10, 2016 Page 2 ASTM methods. Our compaction test results performed in the%" aggregate base course in the footing areas are presented on Figure 2. The soil conditions as observed and tested in the excavation are consistent with those previously encountered on the site and suitable for support of spread footings designed for the recommended allowable bearing pressure of 2,500 psf. The bearing soils should be protected from frost and concrete should not be placed on frozen soils. Other recommendations presented in our previous report which are applicable should also be observed. The recommendations submitted in this letter are based on our observation of the soils exposed within the foundation excavation and the previous subsurface exploration at the site. Variations in the subsurface conditions below the excavation could increase the risk of foundation movement. We should be advised of any variations encountered in the excavation conditions for possible changes to recommendations contained in this letter. Our services do not include determining the presence, prevention or possibility of mold or other biological contaminants (MOBC) developing in the future. If the client is concerned about MOBC, then a professional in this special field of practice should be consulted. If you have any questions or need further assistance, please call our office. Sincerely, H-P~KUMAR Thomas J. Westhoff, CET Reviewed by: TJW/ksw Attachments: cc: PNCI Construction -Mark Viera (markv@pnciconstmction .com) H·P ~KUMAR Project No . 16-7 -279 Particle Size Distribution Report .. Ii c ~ . c: g 'ii? g ~5 .5 -~ ~ .IO {;; C> C> C> ~ i& ; ;;. ;r .. N <'] --"' ID ~ .., "' -~ r"I .. .. .. ... 1t: ti: -100 ;1 lit I JJUJ[ JI I I ;11 ll I J I I: I I I I I II 1 l _j 90 I I l' I I I l'l 1 n 1 1 :1 : - I I I I I I I I I I I I I I I I BO I II II .1-:I'! ~,, I I I 11 l I I I I I i' l I l I I I l 70 I I I I I I I : i · I: I : I I I I I 1 I I I I I I I I I I l I I l I l I I ! I I I I I 0::: w 60 f . ' I 11 I I r 111- ,-\-. -+-I t I z I I ~ I I I I I I I I I u: I-t I \ I I I I I I l I l .... z 50 I I -,__ l ,, , r l}l I !.I: I I I I -w r\ u I I I ~l : ~ l I I I 0::: I ,Ii I I I I ~ .. ,_,_ w 40 , r1~1i11 t 11 :11: -a.. I I I I I I I I ~ I I I I~~ I I I l 30 T::':1·1 Jl~]]j I I --I II II I II I I I I I I I I ,_ lJ._L_LI. I I I II 20 I I I I I I r1 Jrn=t~ K I I l I I I I I I I ~I I I 10 _,__ I--1 " 11 ' Ir r+ -~ ~~I f I I I I I I ! liTT I 11:1 :I I I I 0 I I I I I I I I ! I 100 10 1 01 0.D1 0 .001 GRAIN SIZE -mm . %+3" % Gravel ",{.Sand "k Flnea Coarse Fina Coarse I Medium I Fine Slit I Clav 37 23 8 6 ' 8 I I 7 SIEVE PERCENT SPEC: PASS? Material Descrll!tlon SIZE FINER PERCENT (X=NO) Sandy Gravel 5 100 Pil Run 3 63 1.5 50 Atterberg Limits .75 40 .375 34 PL= NP LL= NV Pl= NP #4 32 CQefficlents #8 27 055= 103.2441 Dso= 64.9361 D50= 38.1000 #16 24 030= 3.5907 015= 0.3000 D10= 0.1500 #30 21 Cu= 432.91 Cc= 1.32 #50 15 Classlflcatlon 11100 10 USCS= GW -GM AASHTO= A-1-a 11200 7.1 Remarks . (no spccilicalion provided) Location: Stockpile -Mamm Creek Sample Number: 228-16 Date: 1 0/03/2016 Hepworth-Pawlak Client: Garfield County Geotechnical, Inc. Project: CNG Shop Addition.County Road 333, Garfield County, Colorado Glenwood Springs. Colorado Proiect No: 16·7·279 Fiaure I Tested By: __,_K_,_,O""---------Checked By: =S=LP'---------- H-P~,KUMAR 5020 County Road 154 Glenwood Springs, CO 81601 c ;c.;:;:tt~.:·• ) c.:1 1 ::'.11ga1eeri119 ! Engineer ng Geolo)J 1 Phone: (970) 945-7988 r·:.at ;;n;its "[t=;<'lii-g I Env;ro.~rn2,.t:1! Fax: (970) 945-8454 Email: hpkg lenwood@kumarusa.com Office Locations: Parker, Glenwood Springs, and Silverthorne, Colorado Earthwork Compaction Testing Report Client: Garfield County Road and Bridge Department Project No.: 16-7-279 Day: Tuesday Attn: Debbie Fiscus Date: 10/4/16 0298 County Road 333A Page: 1 of 1 Rifle, Colorado 81650 Project: CNG Shop Addition, 0298 County Road 333A, Garfield County, Colorado --- Weather: Clear, calm, dry Temperature: 51° at 9;00 am -- Earthwork Contractor: Eagles Nest Excavating Equipment Used: Track hoe, track loader, vibratory plate tamper Description of Earthwork Backfill below addition footing areas was completed using 3/4 inch aggregate Tested: base course. Tests indicated acceptable compaction, referencing standard Proctor from the source. Verbal Communication: Mark with PNCI was informed of our test results. - Placement and Compaction Procedure: Reported by the Contractor. - Lift Thickness: 6inches Max. Rock Size: 3/4" Moisture hose Conditioning: Compactor(s) Used: vibratory plate tamper Number of Passes: not reported Nuclear Gauge Moisture/Densi t~' Test Results Location Field Dry Field Field Min. Test Depth or Density Moisture Comp. Comp. Proctor No. Footing Area Backfill Elev. (pcf) Content (%) Req. Lab No. % (%) 1 12' E of southwest corner of footing 138.1 4.2 102 100 179-16 addition grade 2 30' N of southwest corner of footing 139.3 4.5 103 100 179-16 addition grade 3 15' E of northwest corner of footing 136.3 4.0 101 100 179-16 addition. grade Proctor Sample Reference: Lab No. Method Description Max. Dry Opt. Dens.(%) Moist.(%) 179·16 (16·7·225) ASTM D 698 Class 6 aggregate base course, United Rifle Pit 135.0 7.7 THIS REPOR.T PRESENTS OPINIONS AS A RESULT OF OUR OBSERVAYIONSOF FM PLACEMENT WE HAVE REL 1£0 ON TH E CONTRAC TOR TO CONTllWE AP?l YI.NG THE RECOMM f NOFI'> COMPACT/VE EFFORT AND MOISTURE TO FJLL DURING THE TIMES WHEN OUR OBSERVER IS NOT OBSERVING OPERAT10NS THE NUCLEAR DENSOMl;TER METHOD OF TESTING WAS useo N SUBSTANTIAL ACCORDANCE WITH ASTM 0 6'l)B Distribution: Garfield County Road and Bridge Department -Debbie Fiscus (dfi scus@garfield.county.com) PNCI Construction -Mark Viera (ma rk v@pnc lc ons tructi on.com) /tjw Phil orsrn Thomas J. Westhoff, CET Field Technician Reviewed by H-P ~l <UMAR Geotechnical Eng1neenng Eng•neHr,ng .;'.eology MJteii;:ils Testing I Enwonment8i 5020 County Road 154 Glenwood Springs, CO 81601 Phone: (970) 945-7988 Fax: (970) 945-8454 Email : hpk gl e nw oo d@k umarus a .co m Office Locations : Parker, Glenwood Springs, and Silverthorne, Colorado CONCRETE TEST REPORT Garfield County Road and Bridge Department Attn: Debbie Fiscus 0298 County Road 333A Rifle, Colorado 81650 Project No. Date Cast: Sheet: 16·7-279 10-06-16 1of1 Project: CNG Shop Addition, 0298 County Road 333A, Garfield County, Colorado Placement Location: Footings Supplier: United Truck No: 6385 Ticket No: 03308722 Mix Design: 35514714 Method of Placement: Pump Time Sampled: Air Temp: 2:35 pm 56° Time Batched : Time Arrived: Time Placed : Wet Unit Wt: Slump: 1:51 pm Load Size (Yds): 2:05pm Yds Delivered: 2:15 pm Yds Ordered: Sample Point: Truck Discharge 139.2 pcf Sgecifications : 4Y:z inches 10 10 20 Concrete Temp: 78° None Air Content: 6.8 % Air Content: 6to8% Water Added: Communication: The contractor and supplier were informed of our field test results. Time Cylinders Cast: 2:45 pm Initial Cure Time On Site: 1 day Date in Lab: 10-07-16 -2016 Lab Age Date Number Days 651A 7 10-13-16 6518 28 11-03-16 651C 28 11-03-16 6510 28 11-03-16 Field Storage: Insulated Cure Box Compressive Strength Data Compressive Load Diameter Area Strength (psi) lbs. in . in 2 36,300 4.01 12.63 2870 53,400 4.01 12.63 4230 49,300 4 .01 12.63 3900 50,200 4.01 12.63 3980 28 Day Avg. (psi) 4040 Specified Strength for Structure: 3500 psi at 28 days Specified Strength for Mix: 3500 psi at 28 days Notes: Distribution: Garfield County Road and Bridge Department-Debbie Fiscus (dflscus@g arfleld-counly.com) PNCI Construction -Mark Viera (markv@pnciconstruction.com) United Companies Distribution List /ljf Paul Weiser Thomas J. Westhoff, CET Field Technician Reviewed by H-P~l<UMAR Geo\ec:hn1cal EngmF.ering Eng1neer:ng Ge:)logy r.1atena1s les1tng I Enviro11me11lal 5020 County Road 154 Glenwood Springs, CO 81601 Phone: (970) 945-7968 Fax: (970) 945-8454 Email: hpkglenwood@kumarusa .cgm Office Localions: Pari<er, Glenwood Springs, and Silverthorne, Colorado CONCRETE TEST REPORT Garfield County Road and Bridge Department Attn: Debbie Fiscus 0298 County Road 333A Rifle, Colorado 81650 Project No. Date Cast: Sheet: 16-7-279 10-12-16 1of1 Project: CNG Shop Addition, 0298 County Road 333A, Garfield County, Colorado Placement Location: Foundation Walls Supplier: United Tiine Batched: Truck No: 6396 Time Arrived : Ticket No: 03308782 Time Placed: Mix Design: 36014700 Method of Placement: Pump Time Sampled: 1 :40 pm Wet Unit Wt: Air Temp: 72° Slump: Concrete Temp: 82° Air Content: Water Added: 5 gallons per contractor 12:51 pm 1:25 pm 1:30 pm Sample Point: 141.0 pcf 3.0 inches 6.6% Load Size (Yds): 9 Yds Delivered: 9 Yds Ordered: 18 Truck Discharge Communication: The contractor and supplier were informed of our field test results. Time Cylinders Cast: 1:50 pm Initial Cure Time On Site: 1 day Date in Lab: 10-13-16 2016 Lab Age Date Number Days 665A 5 10-17-16 6658 7 10-19-16 665C 28 11-09-16 6650 28 11-09-16 665E 28 11-09-16 Field Storage: Insulated Cure Box Compressive Strength Data Compressive Load Diameter Area Strength (psi) lbs. in. in 2 38,600 4.01 12.63 3060 43,500 4.01 12.63 3440 52,700 4.01 12.63 4170 53,200 4.01 12.63 4210 51,200 4.01 12.63 4050 28 Day Avg. (psi) 4140 Specified Strength for Structure: 4000 psi at 28 days Specified Strength for Mix: 4000 psi at 28 days Notes: 5-day test was requested by Mark Viera with PNCI. Distribulion: Garfield County Road and Bridge Department~ Debbie Fiscus (dfiscus@garfleld -county.com) PNCI Construction -Mark Viera (markv@pnciconstruction.com} DPA Architectural Group • Doug Porterfield (douq@dpaarchgroup.com) Monroe & Newell -Ryan Barth (rbarth@monroe-newell.com} United Companies Distribution List Paul Weiser lljf Field Technician Thomas J. Westhoff, CET Reviewed by H -P ~l <UMAR Ge010c:hn •ca1 Eng1n€o;rmg I En.;;,neer:11g Geology td:JlC 11:1!s Tt:$!J~~g; En\nron1nenlal 5020 County Road 154 Glenwood Springs, CO 81601 Phone: (970) 945-7988 Fax: (970) 945-8454 Email: hpkglenwood@kumafusa .com Office Locations: Parker, Glenwood Springs, and Silverthorne, Colorado CONCRETE TEST REPORT Garfield County Road and Bridge Department Attn: Debbie Fiscus 0298 County Road 333A Rifle, Colorado 81650 Project No. Date Cast: Sheet: 16-7-279 11-07-16 1of1 Project: CNG Shop Addition, 0298 County Road 333A, Garfield County, Colorado Placement Location: Interior Slab-on-Grade Supplier: United Time Batched: Load Size (Yds): 10 Truck No: 6383 Time Arrived: Yds Delivered: 20 Ticket No: 03309067 Time Placed: 7:24 am 8:25 am 8:35 am Yds Ordered: 20+ Mix Design: 36510769 Method of Placement: Pump Time Sampled: 8:36 am Wet Unit Wt: Air Temp: 36° Slump: Concrete Temp: 70° Air Content: Water Added: 6 gallons per contractor Sample Point: 145.8 pcf 6.0 inches 1.6% Truck Discharge Communication: The contractor and supplier were informed of our field test results. Time Cylinders Cast: 8:45 am Initial Cure Time On Site: 1 day Date in Lab: 11-08-16 2016 Lab Age Date Number Days 729A 7 11-14-16 729B 28 12-05-16 729C 28 12-05-16 7290 Hold/28 Field Storage: Insulated Cure Box Compressive Strength Data Compressive Load Diameter Area Strength (psi) lbs. in. in 2 57,400 4.01 12.63 4550 28Day Avg. (psi) Specified Strength for Structure: 4000 psi at 28 days Specified Strength for Mix: 4000 psi at 28 days Notes: Distribution: Garfield County Road and Bridge Department· Debbie Fiscus (dfiscus@ga rfield-count v.com) PNCI Construction -Mark Viera (markv@pnciconstruction.com) DPA Architectural Group· Doug Porterfield (doug@dpaarchgroup.com) Monroe & Newell -Ryan Barth (rbarth@monroe-n ewell.com) United Companies Distribution List Paul Weiser Thomas J. Westhoff, CET --~~--'...;;.,_~~~~~.....;..;.;._.;;....;..;,...~~..:....;...=; __ Field Technician Reviewed By /ljr H -P ~KUMAR Geotechnical Engineering I Engineering Geology Materials Tesling I Environmental 5020 County Road 154 Glenwood Springs, CO 61601 Phone: (970) 945-7988 Fax: (970) 945-8454 Email: hpkglenwood@kumarusa.com Office Locations: Parker, Glenwood Springs, and Silverthorne, Colorado October 10, 2016 Garfield County Road and Bridge Department Attn: Debbie Fiscus 0298 County Road 333A Rifle, Colorado 81650 d fiscus@garfie ld-county.com Project No. 16-7-279 Subject: Observation of Excavation, Proposed CNG Shop Addition, 0298 County Road 333A, Garfield County, Colorado Dear Ms. Fiscus: As requested by Mark Viera with PNCI Construction, Inc., a representative of H-P/Kumar observed the excavation at the subject site on September 28 and October 3 and 4, 2016 to evaluate the soils exposed for foundation support. The findings of our observations and recommendations for the foundation design are presented in this report. HP Geotech (now H-P Kumar) previously conducted a subsoil study for design of foundations at the site for the original development and presented our findings in a report dated April 23, 2002, HP Geotech Job No. 102 190. We also provided an addendum to the subsoil study for the proposed addition in a report dated December 17, 2015, HP Geotech Job No. 115 588A. The proposed addition will be attached to the west side of the existing shop building. It is designed to be supported on spread footings bearing on undisturbed bedrock or suitable compacted structural fill with an allowable bearing pressure of 2,500 psf, based on our previous reports. At the time of our visit to the site on September 28, the foundation excavation had been cut in one level, about 3'12 feet below the adjacent ground surface. The soils exposed in the bottom of the excavation consisted of siltstone/sandstone bedrock in about the southern two-thirds of the excavation' and unsuitable clay and sand/silt soils in the northern o~e-third of the excavation. An exploratory test pit excavated at the north addition footing line exposed bedrock at about 7 feet below design footing elevation. On October 3 and 4, we observed that the northern two-thirds of the foundation excavation had been excavated about 3Y2 to 11 feet below design footing elevation to expose sandstone/siltstone bedrock. No free water was encountered in the excavation and the bedrock was slightly moist. We then observed imported minus 6-inch "pit run" sandy gravel placed and compacted in relatively thin lifts to backfill the footing areas and capped with compacted % inch aggregate base course to re-establish design footing grade. The results of a gradation analysis performed on a sample of the "pit run" sandy gravel obtained from the site, presented on Figure 1 indicate that the material was too rocky to test for compaction by Garfield County Road and Bridge Department October 10, 2016 Page 2 ASTM methods. Our compaction test results performed in the W' aggregate base course in the footing areas are presented on Figure 2. The soil conditions as observed and tested in the excavation are consistent with those previously encountered on the site and suitable for support of spread footings designed for the recommended allowable bearing pressure of 2,500 psf. The bearing soils should be protected from frost and concrete should not be placed on frozen soils. Other recommendations presented in our previous report which are applicable should also be observed. The recommendations submitted in this letter are based on our observation of the soils exposed within the foundation excavation and the previous subsurface exploration at the site. Variations in the subsurface conditions below the excavation could increase the risk of foundation movement. We should be advised of any variations encountered in the excavation conditions for possible changes to recommendations contained in this letter. Our services do not include determining the presence, prevention or possibility of mold or other biological contaminants (MOBC) developing in the future. If the client is concerned about MOBC, then a professional in this special field of practice should be consulted. If you have any questions or need further assistance, please call our office. Sincerely, H-P~KUMAR Thomas J. Westhoff, CET Reviewed by: TJW/ksw Attachments: cc: PNCI Construction -Mark Viera (markv@pnciconstruction.com) H-P l>: KUMAR Project No . 16·7-279 100 90 - %+3" SIEVE SIZE 5 3 1.5 .75 .375 #4 37 s ID PERCENT FINER Particle Size Distribution Report GRAIN SIZE -mm. 'lo Gravel %Sand Coarse I Fine Coarse Medium I Fine Slit 23 I s SPEC: PERCENT PASS? (X=NO) 6 8 Sandy Gravel Pil Run PL= NP II 0 85= 103 .2441 030= 3 .5907 Cu= 432.91 Material Description Atterberg Limits LL= NV Coefficients 0 60= 64 .9361 015= 0.3000 Cc= 1.32 Classjficatlon %Flnea Clay 7 Pl= NP 050= 38.1000 010= 0 .1500 #8 #16 #30 #50 #100 11200 100 63 50 40 34 32 27 24 21 IS IO 7.1 USCS= GW·GM AASHTO= A-l·a • (no spccilication provided) Location: S1ockpilc -Mnmm Creek Sample Number: 228-16 Hepworth-Pawlak Geotechnical, Inc. Glenwood Springs, Colorado Remarks Date: I 0/03/20 16 Client: Garfield County Project: CNG Shop Addition,Counly Road 333, Garfield Counly, Colorado Prolect No: 16-7-279 Flaure Tested By: ..:.K::.:::O~--------Checked By: =SL=P ________ _ H-P ~-KUMAR 5020 County Road 154 Glenwood Springs, CO 81601 ( 10C-·fl~.:-1 'C<•' Eng111aer1n9 1 Enf;ineer ng Geolt'(:J:1 Phone: (970) 945-7988 Halfn;ils 11;~1;;-9 I Env•ro nienlcJI Fax: (970) 945·8454 Email: hpkglenwood@kumarusa.com Office Locations: Parker, Glenwood Springs, and Silverthorne, Colorado Earthwork Compaction Testing Report Client: Garfield County Road and Bridge Department Project No.: 16-7-279 Day: Tuesday Attn: Debbie Fiscus Date: 10/4/16 0298 County Road 333A Page: 1 of 1 Rifle, Colorado 81650 Project: CNG Shop Addition, 0298 County Road 333A, Garfield County, Colorado Weather: Clear, calm, dry Temperature: 51° at 9;00 am Earthwork Contractor: Eagles Nest Excavating Equipment Used: Track hoe, track loader, vibratory plate tamper Description of Earthwork Backfill below addition footing areas was completed using 3/4 inch aggregate Tested: base course. Tests indicated acceptable compaction, referencing standard Proctor from the source. Verbal Communication: Mark with PNCI was informed of our test results. Placement and Compaction Procedure: Reported by the Contractor. Lift Thickness: 6inches Max. Rock Size: 3/4" Moisture hose Conditioning: Compactor(s) Used: vibratory plate tamper Number of Passes: not reported Nuclear Gauge Moisture/Densitv Test Results Location Field Dry Field Field Min. Test Depth or Density Moisture Comp . Comp. Proctor No. Footing Area Backfill Elev. (pcf) Content (%) Req. Lab No. % (%) 1 12' E of southwest corner of footing 138.1 4.2 102 100 179-16 addition grade 2 30' N of southwest corner of footing 139.3 4.5 103 100 179-16 addition arade 3 15' E of northwest corner of footing 136.3 4.0 101 100 179-16 addition, grade Proctor Sample Reference: Lab No. Method Description Max. Dry Opt. Dens.(%) Moist.(%) 179-16 (16-7-225) ASTM 0698 Class 6 aaaregate base course, United Rifle Pit 135.0 7.7 THIS REPORT PRESENTS OPINIONS AS A RESULT OF OUR OBSERVATIONSOF FIU Pl.ACEMENT we HAVE REL .ED ON THE CONTRACTOR TO CONTINUE AJ'IPLVING me RECDr.tMENDEO COMPACTIVE EFFORT ANO MOISTURE TO FILL DURING THE TIMES WHEN OUR OBSERVER IS NOT OBSERVING OPERATIONS THE NUCLEAR DENSOMETER METHOD OF TESTING WAS USED JN SUBSTANTIAL ACCORDANCE WITH ASTM 0 6~3n Distribution: Garfield County Road and Bridge Department· Debbie Fiscus (driscus@garfield·countv.com) PNCI Construction -Mark Viera (markv@pnciconstruction .com) /tjw Phil Or~ill Thomas J. Westhoff, CET Field Technician Reviewed by